Telephony.



PATENTED MAR. 12, 1907.'

1H. J. FISHER. TELEPHONY.

` APPLICATION FILED AUG.25,19( )6.

Witwe/.50% N 'narran-sumas rA'rENrl OFFICE.'

maori) .'J'AoKsONFIsHER, ornorcnkfss, COLORADO, AssIGNOR O'FgoNE--- -i-{Atr ,'roc-EORGE H. DUKE, or. HO'roHKIss, COLORADO.

No. 847,283. Y

T @ZZ whom, it 'rm/.y concern/.-

Be it known that I, HAROLD JACKSON l* IsHE'R, a citizen of the United States, residing-at Hotchkiss, in the county of Delta and..

State of Colorado, have invented new and useful Improvements in Telephony,v of which 1 vthe following is a specification.

This Ainvention is a selective telephone system employing ratchet-wheels at the various stations 'controlled vby an operator lat central to establishthe various connections by means of polarized electromagnets-` A feature ofthe invention is that the local batteries are not connected to the selective apparatus, so that they arenot sapped of their current everytime a subscriber in the system is called.

A further feature is' that the bells are disconnected whenat normal, so that any current may be produced on th'elline withoutf ringing the bells ;"but all generators are in connection, so that any subscriber can call central at any time without `the use of any emergency or auxiliaryapparatus.4

The apparatus at one station and connecfl tions -to central are illustrated intheI accompanying drawings, in which-4 i Figure 1 is a diagrammaticview thereof.'

Fig. 2 is a section on the line 2 2 of Fig. 1.

The drawings .being largely. dia ammatic, the construction'fand operation wi lbe jointly described, after statinor that H is the selecting ratchet-wheel made of insulating material and having notches corresponding to thel stations on the line, B2 is. the local battery,

I B is the central .batteryor source ofenergy,

and E Vis the electromagnet at central cony trollingthe drop-signal F. of the line. The parts are shown connected up for station No.:

15, but in normal position-#that is, the talking-circuit, is not established.

To call. central, when the crank of the generator G at the station is turned a current passes through lines A1B' C D225 26, coil E, drop F,.lines 27 28,*to a spring 29, which bears against avtooth 18, as shown, of the ratchet-wheel H and thence via a wire ja, carried by said wheel, toanother tooth 24 and to a sprin 30slide 30a, spring 31, lines 32 33, vand bac to enerator.' This operates the drop F and cal s central, `which has the usual talking connections, (not shown,) and lthe operator can then call the desired subscriber. Thus to call No. v15, the station Specification of LetterslPatent. v

l I Patented March 12,1,907.

Application ned lingua z5. 1906. serai No. 332.044.

shown, the key K is depressed 'suflicientl 5 5vnumber of times to turnthe ratchet-Wheel from normal yuntil the spring '29 engages tooth No.15 ofthewheeh which inthe inf' stance shown will be -twenty-two times, the wheel lhaving twenty-four teethv and the v6o spring normally resting on tooth'No.-18`. T he depressions of the key K cause a corref.

sponding number of pulsations to pass over, A

Llines 34, 25, and D, through polarized magnet L,`togroundg. Ateachpulsation the pivoted 65e, armature P ofthe electromagnet-,swingsto Vthe left. The armature extends at'it upperend into a notch in the slide' 30,. carrying the spring 30, engagin the ratchet-wheel, andv at each swing the s ide is moved to the left, 7o

turning the wheel one step or tooth. The spring '31 returns the slide and .fu-mature each time, The tooth 15 being thus brought into" contact with spring 29., the ringing and' talk:

.ingcircuit is established as follows:

7 The key M at central is depressed-andthe s current flows through lines 35 2728 29', tooth. 15,'wire b, carried bythe insulated Wh'eelH,` shaft O of the wheel, spring N, which lbears against oneend of the shaft, lines 36 37, and 8o 'magnet L in the opposite direction,- back'to lines D, 25, and 38, causing the amatureP to swing to the right. The upper end-of .the '5 armature projects 'behind a depending arm q' on a' slide Q, so that when itswings to the 85 right it moves theslidein the same direction and pushes contact-springs S and `U against point V,' where the'y remain until the slide -is retracted in a manner to be hereinafter dee l scribed, being held by a spring-, which is 9o fastenedk to .the slide and snaps into a notch 'in the' end ofl a block x', supported on the.

frame ofthe instrument. This connects the y telephone lines 25- and l27' via line 39, con- .i

nectingspring S, to' line 27, li'ne 42 connecting 9. 5

point Btc bell-circuit, and line connecting telephone is connecited in the manner described.

One tooth of the ratchet-wheel at cach station is appropriated. to a busy signal which may be set by central when the line is in use.

4In the instance shown it is the tooth No. 17.

' To set the signal, (the telephone connection end of the shaft Olopposite that heretofore' referred to and thence by spring 40, in con# sidered necessary.

.from each other, as shown at o.

with the stations having been established as above set forth,) the key K is depressed twice more, which brings tooth 17 in contact with spring -29 and brings a sign W, carried by the wheel, opposite 4the window X, throughi which the busy signal thus shows. The wheel and other .parts stand in this osition until the subscribers are through taking Org until central wishes the line, and there are onlyv two telephones connected to the line, so that other parties cannotl listen in; but the generators at all the stations are connected as follows: At'the 'stations where the telephones are disconnected a currentmaypass from the generator G through lines A B O D 25 2 6, coilE, drop F, lines 27 28', and

yspring 29 to the -tooth 17, which is connected by a wire c, carried by the wheel H, to the tact with said end, and line 41 back to geinerator, so any party can call central. The

opposite ends 4ofthe shaft O are insulated operator wants tocut off the stations .using the line, the line-key K is depressed and Inag-4v net L energized again, so that armature 1:'A yswings to the lei-'tand slide 30a and spring 80 turn wheel II into normal `position againthat 1s, with spring 29 on tooth 18, and during this movement 4a projection Z on shaft Or strikes the spring on slide Q and disengagesl same from the notch in block allowing' the spring S to push said slide back, breaking the circuit at contacts S, U, and V and cutting 'off the telephones.

It is to be noticed that the slide Q is operf ated by the armature swinging to the right and the slide 30a byswinging tothe left. 1a

is a stop for the slide`30a, and 2a is astop forv ,the 4slide Q. The parts are all inclosedin a sultable casing and sup orted in a suitable manner to operate as in icated, no extended' description of lsuch 'minor features being-con- I claiml. In a selective telephone system, in com- I bination, a central station, local stations, a selecting-wheel at each local station, a polarizedmagnet at each local station normally connected on one side to the central station, and havlng an armature operatively connected to the wheel and responsive to im- If then the pulses in one direction to turn the wheel, means part of which are carried by the wheel to connect the magnetA on the other`y side to central, normally open contacts inthe talking-circuit of each station, and means operated by the armature and responsive to imy lpulses in the opposite -direction to close the contacts.

2. In a selectivetelephone system, in combination, a central station,l local stations, a selecting-Wheel lat each local station, a polarized magnet at each local station, connected to and controlled from the centralstati'on and having a swinging armature, a slide operatively connected to the armature and tol thelwheel and adapted to turn the latter when the former swings one way, normally open' contacts in the talking-circuit of` each station,

a slide connected to the armature and movable thereby when it swings the other'way to close the contacts, and means actuated by the wheel, when restored to normal position,

to retract the `latter slide to open said con ,I

tacts.

3. In a selective tele hone system, the com# tions,fof a selective apparatus ateach station comprising a toothed wheel having a con` ducting connection between two of its teeth, 'a spring connected to line and normally inl contact with one of saidteeth, a slide 'having bination with a centra station, and local-sta- Y a conducting connection to the generator at.-4 I

such station and having a spring normally in contact with the other of said teeth, a polarjized magnet connected on one side to a se rcol bination, a central station, local stations, a

selecting-wheel at each local station,`,signal and selective 'connections between the cen' tral and local stations, part of'said connections being carried by the wheel, and means controlled at lcentral station to operate the` Wheel and connect selected local stations and to maintain the `signal connections from the .other stations to central during the' time the'v selected-stations are connected.'

In testimony whereof have signed -my name 'to this specification in thepr'esencejbf two subscribing witnesses', .HAROLD JACKSON Witnesses: Gao. H. DUKE,

FRED W. SIMoNns, 

